Your post was clear to me, Gray Beard. Both you and the kid had a blast, which is what it's all about. And, that's a good looking design on the covering. Looks like a keeper..
I've not flown a plane with a 4s engine except for an OS 52 Surpass several years ago, and for what it was on, it did great. Break in was minimal and it flew without incident for as long as I had it.
Again, nice looking plane!! AND, one great smile!!!